./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/mix040_power.oepc_pso.oepc_rmo.oepc.i --full-output --witness-type correctness_witness --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --validate ./goblint.2024-05-21_14-57-05.files/protection/mix040_power.oepc_pso.oepc_rmo.oepc.yml/witness.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 76401ed0 Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReachWitnessValidation.xml -i ../../../trunk/examples/svcomp/pthread-wmm/mix040_power.oepc_pso.oepc_rmo.oepc.i ./goblint.2024-05-21_14-57-05.files/protection/mix040_power.oepc_pso.oepc_rmo.oepc.yml/witness.yml -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --traceabstraction.compute.hoare.annotation.of.negated.interpolant.automaton,.abstraction.and.cfg false --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.fs.goblint-validation-76401ed-m [2024-06-20 16:21:38,806 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-20 16:21:38,880 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-20 16:21:38,884 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-20 16:21:38,885 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-20 16:21:38,909 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-20 16:21:38,910 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-20 16:21:38,910 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-20 16:21:38,911 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-20 16:21:38,914 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-20 16:21:38,914 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-20 16:21:38,914 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-20 16:21:38,915 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-20 16:21:38,916 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-20 16:21:38,916 INFO L153 SettingsManager]: * Use SBE=true [2024-06-20 16:21:38,916 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-20 16:21:38,916 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-20 16:21:38,917 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-20 16:21:38,917 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-20 16:21:38,917 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-20 16:21:38,917 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-20 16:21:38,917 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-20 16:21:38,918 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-20 16:21:38,918 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-20 16:21:38,918 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-20 16:21:38,918 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-20 16:21:38,918 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-20 16:21:38,919 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-20 16:21:38,919 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-20 16:21:38,919 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-20 16:21:38,920 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-20 16:21:38,920 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-20 16:21:38,920 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-20 16:21:38,921 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-20 16:21:38,921 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-20 16:21:38,921 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-20 16:21:38,921 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-20 16:21:38,921 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-20 16:21:38,921 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-20 16:21:38,922 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-20 16:21:38,922 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-20 16:21:38,922 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-20 16:21:38,922 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-20 16:21:38,922 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-20 16:21:39,131 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-20 16:21:39,148 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-20 16:21:39,150 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-20 16:21:39,151 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-20 16:21:39,152 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-20 16:21:39,153 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-05-21_14-57-05.files/protection/mix040_power.oepc_pso.oepc_rmo.oepc.yml/witness.yml [2024-06-20 16:21:39,387 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-20 16:21:39,388 INFO L274 PluginConnector]: CDTParser initialized [2024-06-20 16:21:39,389 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/mix040_power.oepc_pso.oepc_rmo.oepc.i [2024-06-20 16:21:40,334 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-20 16:21:40,570 INFO L384 CDTParser]: Found 1 translation units. [2024-06-20 16:21:40,570 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/mix040_power.oepc_pso.oepc_rmo.oepc.i [2024-06-20 16:21:40,592 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0773907be/a00ff33b29d04bd8b461ffa462be68ef/FLAG2cd5dd7ca [2024-06-20 16:21:40,606 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0773907be/a00ff33b29d04bd8b461ffa462be68ef [2024-06-20 16:21:40,607 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-20 16:21:40,608 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-20 16:21:40,610 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-20 16:21:40,610 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-20 16:21:40,614 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-20 16:21:40,614 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 20.06 04:21:39" (1/2) ... [2024-06-20 16:21:40,615 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2d61a4c9 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 04:21:40, skipping insertion in model container [2024-06-20 16:21:40,615 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 20.06 04:21:39" (1/2) ... [2024-06-20 16:21:40,617 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@7adda4d8 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 04:21:40, skipping insertion in model container [2024-06-20 16:21:40,617 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.06 04:21:40" (2/2) ... [2024-06-20 16:21:40,617 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2d61a4c9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.06 04:21:40, skipping insertion in model container [2024-06-20 16:21:40,617 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.06 04:21:40" (2/2) ... [2024-06-20 16:21:40,617 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-20 16:21:40,736 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-20 16:21:40,737 INFO L97 edCorrectnessWitness]: Location invariant before [L872-L872] ((((((((((((((((((((((! multithreaded || ((0 <= b$w_buff1 && b$w_buff1 <= 1) && (b$w_buff1 == 0 || b$w_buff1 == 1))) && (! multithreaded || ((0 <= b$mem_tmp && b$mem_tmp <= 1) && (b$mem_tmp == 0 || b$mem_tmp == 1)))) && (! multithreaded || (((0 <= x && x <= 2) && x <= 127) && ((x == 0 || x == 1) || x == 2)))) && (! multithreaded || ((0 <= b && b <= 1) && (b == 0 || b == 1)))) && (! multithreaded || ((0 <= b$w_buff0 && b$w_buff0 <= 1) && (b$w_buff0 == 0 || b$w_buff0 == 1)))) && (! multithreaded || (((0 <= y && y <= 2) && y <= 127) && ((y == 0 || y == 1) || y == 2)))) && (! multithreaded || ((0 <= a && a <= 1) && (a == 0 || a == 1)))) && (! multithreaded || b$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || b$read_delayed == (_Bool)0)) && (! multithreaded || b$read_delayed_var == 0)) && (! multithreaded || b$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || ((0 <= z && z <= 1) && (z == 0 || z == 1)))) && (! multithreaded || b$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || b$r_buff1_thd4 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p3_EAX && __unbuffered_p3_EAX <= 1) && (__unbuffered_p3_EAX == 0 || __unbuffered_p3_EAX == 1)))) && (! multithreaded || b$r_buff0_thd4 == (_Bool)0)) && (! multithreaded || b$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 1) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || b$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || b$flush_delayed == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p3_EBX && __unbuffered_p3_EBX <= 1) && (__unbuffered_p3_EBX == 0 || __unbuffered_p3_EBX == 1)))) && (! multithreaded || b$r_buff0_thd3 == (_Bool)0) [2024-06-20 16:21:40,737 INFO L97 edCorrectnessWitness]: Location invariant before [L876-L876] ((((((((((((((((((((((! multithreaded || ((0 <= b$w_buff1 && b$w_buff1 <= 1) && (b$w_buff1 == 0 || b$w_buff1 == 1))) && (! multithreaded || ((0 <= b$mem_tmp && b$mem_tmp <= 1) && (b$mem_tmp == 0 || b$mem_tmp == 1)))) && (! multithreaded || (((0 <= x && x <= 2) && x <= 127) && ((x == 0 || x == 1) || x == 2)))) && (! multithreaded || ((0 <= b && b <= 1) && (b == 0 || b == 1)))) && (! multithreaded || ((0 <= b$w_buff0 && b$w_buff0 <= 1) && (b$w_buff0 == 0 || b$w_buff0 == 1)))) && (! multithreaded || (((0 <= y && y <= 2) && y <= 127) && ((y == 0 || y == 1) || y == 2)))) && (! multithreaded || ((0 <= a && a <= 1) && (a == 0 || a == 1)))) && (! multithreaded || b$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || b$read_delayed == (_Bool)0)) && (! multithreaded || b$read_delayed_var == 0)) && (! multithreaded || b$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || ((0 <= z && z <= 1) && (z == 0 || z == 1)))) && (! multithreaded || b$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || b$r_buff1_thd4 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p3_EAX && __unbuffered_p3_EAX <= 1) && (__unbuffered_p3_EAX == 0 || __unbuffered_p3_EAX == 1)))) && (! multithreaded || b$r_buff0_thd4 == (_Bool)0)) && (! multithreaded || b$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 1) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || b$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || b$flush_delayed == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p3_EBX && __unbuffered_p3_EBX <= 1) && (__unbuffered_p3_EBX == 0 || __unbuffered_p3_EBX == 1)))) && (! multithreaded || b$r_buff0_thd3 == (_Bool)0) [2024-06-20 16:21:40,737 INFO L97 edCorrectnessWitness]: Location invariant before [L874-L874] ((((((((((((((((((((((! multithreaded || ((0 <= b$w_buff1 && b$w_buff1 <= 1) && (b$w_buff1 == 0 || b$w_buff1 == 1))) && (! multithreaded || ((0 <= b$mem_tmp && b$mem_tmp <= 1) && (b$mem_tmp == 0 || b$mem_tmp == 1)))) && (! multithreaded || (((0 <= x && x <= 2) && x <= 127) && ((x == 0 || x == 1) || x == 2)))) && (! multithreaded || ((0 <= b && b <= 1) && (b == 0 || b == 1)))) && (! multithreaded || ((0 <= b$w_buff0 && b$w_buff0 <= 1) && (b$w_buff0 == 0 || b$w_buff0 == 1)))) && (! multithreaded || (((0 <= y && y <= 2) && y <= 127) && ((y == 0 || y == 1) || y == 2)))) && (! multithreaded || ((0 <= a && a <= 1) && (a == 0 || a == 1)))) && (! multithreaded || b$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || b$read_delayed == (_Bool)0)) && (! multithreaded || b$read_delayed_var == 0)) && (! multithreaded || b$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || ((0 <= z && z <= 1) && (z == 0 || z == 1)))) && (! multithreaded || b$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || b$r_buff1_thd4 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p3_EAX && __unbuffered_p3_EAX <= 1) && (__unbuffered_p3_EAX == 0 || __unbuffered_p3_EAX == 1)))) && (! multithreaded || b$r_buff0_thd4 == (_Bool)0)) && (! multithreaded || b$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 1) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || b$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || b$flush_delayed == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p3_EBX && __unbuffered_p3_EBX <= 1) && (__unbuffered_p3_EBX == 0 || __unbuffered_p3_EBX == 1)))) && (! multithreaded || b$r_buff0_thd3 == (_Bool)0) [2024-06-20 16:21:40,738 INFO L97 edCorrectnessWitness]: Location invariant before [L877-L877] ((((((((((((((((((((((! multithreaded || ((0 <= b$w_buff1 && b$w_buff1 <= 1) && (b$w_buff1 == 0 || b$w_buff1 == 1))) && (! multithreaded || ((0 <= b$mem_tmp && b$mem_tmp <= 1) && (b$mem_tmp == 0 || b$mem_tmp == 1)))) && (! multithreaded || (((0 <= x && x <= 2) && x <= 127) && ((x == 0 || x == 1) || x == 2)))) && (! multithreaded || ((0 <= b && b <= 1) && (b == 0 || b == 1)))) && (! multithreaded || ((0 <= b$w_buff0 && b$w_buff0 <= 1) && (b$w_buff0 == 0 || b$w_buff0 == 1)))) && (! multithreaded || (((0 <= y && y <= 2) && y <= 127) && ((y == 0 || y == 1) || y == 2)))) && (! multithreaded || ((0 <= a && a <= 1) && (a == 0 || a == 1)))) && (! multithreaded || b$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || b$read_delayed == (_Bool)0)) && (! multithreaded || b$read_delayed_var == 0)) && (! multithreaded || b$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || ((0 <= z && z <= 1) && (z == 0 || z == 1)))) && (! multithreaded || b$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || b$r_buff1_thd4 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p3_EAX && __unbuffered_p3_EAX <= 1) && (__unbuffered_p3_EAX == 0 || __unbuffered_p3_EAX == 1)))) && (! multithreaded || b$r_buff0_thd4 == (_Bool)0)) && (! multithreaded || b$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 1) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || b$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || b$flush_delayed == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p3_EBX && __unbuffered_p3_EBX <= 1) && (__unbuffered_p3_EBX == 0 || __unbuffered_p3_EBX == 1)))) && (! multithreaded || b$r_buff0_thd3 == (_Bool)0) [2024-06-20 16:21:40,738 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-20 16:21:40,738 INFO L106 edCorrectnessWitness]: ghost_update [L870-L870] multithreaded = 1; [2024-06-20 16:21:40,774 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-20 16:21:41,115 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-20 16:21:41,124 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-20 16:21:41,267 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-20 16:21:41,300 INFO L206 MainTranslator]: Completed translation [2024-06-20 16:21:41,301 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.06 04:21:41 WrapperNode [2024-06-20 16:21:41,301 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-20 16:21:41,302 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-20 16:21:41,302 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-20 16:21:41,302 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-20 16:21:41,307 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.06 04:21:41" (1/1) ... [2024-06-20 16:21:41,323 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.06 04:21:41" (1/1) ... [2024-06-20 16:21:41,354 INFO L138 Inliner]: procedures = 176, calls = 56, calls flagged for inlining = 6, calls inlined = 7, statements flattened = 139 [2024-06-20 16:21:41,355 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-20 16:21:41,356 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-20 16:21:41,356 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-20 16:21:41,356 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-20 16:21:41,364 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.06 04:21:41" (1/1) ... [2024-06-20 16:21:41,371 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.06 04:21:41" (1/1) ... [2024-06-20 16:21:41,374 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.06 04:21:41" (1/1) ... [2024-06-20 16:21:41,397 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2024-06-20 16:21:41,401 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.06 04:21:41" (1/1) ... [2024-06-20 16:21:41,401 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.06 04:21:41" (1/1) ... [2024-06-20 16:21:41,410 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.06 04:21:41" (1/1) ... [2024-06-20 16:21:41,425 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.06 04:21:41" (1/1) ... [2024-06-20 16:21:41,427 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.06 04:21:41" (1/1) ... [2024-06-20 16:21:41,429 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.06 04:21:41" (1/1) ... [2024-06-20 16:21:41,432 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-20 16:21:41,432 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-20 16:21:41,436 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-20 16:21:41,436 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-20 16:21:41,436 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.06 04:21:41" (1/1) ... [2024-06-20 16:21:41,449 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-20 16:21:41,455 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-20 16:21:41,483 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-06-20 16:21:41,485 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-06-20 16:21:41,515 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-20 16:21:41,515 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-20 16:21:41,515 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-20 16:21:41,515 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-20 16:21:41,515 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-20 16:21:41,516 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-20 16:21:41,516 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-06-20 16:21:41,516 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-06-20 16:21:41,516 INFO L130 BoogieDeclarations]: Found specification of procedure P3 [2024-06-20 16:21:41,516 INFO L138 BoogieDeclarations]: Found implementation of procedure P3 [2024-06-20 16:21:41,516 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-20 16:21:41,516 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-20 16:21:41,516 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-20 16:21:41,517 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-20 16:21:41,521 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-06-20 16:21:41,627 INFO L244 CfgBuilder]: Building ICFG [2024-06-20 16:21:41,628 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-20 16:21:41,950 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-20 16:21:41,950 INFO L293 CfgBuilder]: Performing block encoding [2024-06-20 16:21:42,084 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-20 16:21:42,084 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-20 16:21:42,085 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.06 04:21:42 BoogieIcfgContainer [2024-06-20 16:21:42,085 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-20 16:21:42,087 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-20 16:21:42,087 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-20 16:21:42,089 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-20 16:21:42,090 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 20.06 04:21:39" (1/4) ... [2024-06-20 16:21:42,090 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@31190fcd and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 20.06 04:21:42, skipping insertion in model container [2024-06-20 16:21:42,090 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.06 04:21:40" (2/4) ... [2024-06-20 16:21:42,090 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@31190fcd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.06 04:21:42, skipping insertion in model container [2024-06-20 16:21:42,091 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.06 04:21:41" (3/4) ... [2024-06-20 16:21:42,091 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@31190fcd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.06 04:21:42, skipping insertion in model container [2024-06-20 16:21:42,091 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.06 04:21:42" (4/4) ... [2024-06-20 16:21:42,092 INFO L112 eAbstractionObserver]: Analyzing ICFG mix040_power.oepc_pso.oepc_rmo.oepc.i [2024-06-20 16:21:42,105 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-20 16:21:42,105 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 4 error locations. [2024-06-20 16:21:42,105 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-20 16:21:42,162 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-20 16:21:42,192 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 66 places, 53 transitions, 122 flow [2024-06-20 16:21:42,223 INFO L124 PetriNetUnfolderBase]: 0/49 cut-off events. [2024-06-20 16:21:42,223 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-20 16:21:42,225 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62 conditions, 49 events. 0/49 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 87 event pairs, 0 based on Foata normal form. 0/45 useless extension candidates. Maximal degree in co-relation 0. Up to 1 conditions per place. [2024-06-20 16:21:42,226 INFO L82 GeneralOperation]: Start removeDead. Operand has 66 places, 53 transitions, 122 flow [2024-06-20 16:21:42,229 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 56 places, 43 transitions, 98 flow [2024-06-20 16:21:42,240 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-20 16:21:42,286 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopHeads, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@740ba98, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-20 16:21:42,286 INFO L358 AbstractCegarLoop]: Starting to check reachability of 8 error locations. [2024-06-20 16:21:42,290 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-20 16:21:42,291 INFO L124 PetriNetUnfolderBase]: 0/5 cut-off events. [2024-06-20 16:21:42,291 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-20 16:21:42,291 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:21:42,291 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-06-20 16:21:42,292 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-20 16:21:42,295 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:21:42,321 INFO L85 PathProgramCache]: Analyzing trace with hash 405960659, now seen corresponding path program 1 times [2024-06-20 16:21:42,332 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:21:42,332 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [399165560] [2024-06-20 16:21:42,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:21:42,333 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:21:42,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:21:43,324 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:21:43,324 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:21:43,325 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [399165560] [2024-06-20 16:21:43,325 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [399165560] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:21:43,326 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:21:43,326 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-20 16:21:43,327 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [623720042] [2024-06-20 16:21:43,327 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:21:43,333 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-20 16:21:43,336 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:21:43,369 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-20 16:21:43,370 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-20 16:21:43,425 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 53 [2024-06-20 16:21:43,428 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 43 transitions, 98 flow. Second operand has 3 states, 3 states have (on average 15.333333333333334) internal successors, (46), 3 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:21:43,428 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:21:43,428 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 53 [2024-06-20 16:21:43,429 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:21:45,356 INFO L124 PetriNetUnfolderBase]: 13331/18439 cut-off events. [2024-06-20 16:21:45,357 INFO L125 PetriNetUnfolderBase]: For 220/220 co-relation queries the response was YES. [2024-06-20 16:21:45,379 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36887 conditions, 18439 events. 13331/18439 cut-off events. For 220/220 co-relation queries the response was YES. Maximal size of possible extension queue 616. Compared 101324 event pairs, 10516 based on Foata normal form. 1/18003 useless extension candidates. Maximal degree in co-relation 36874. Up to 17985 conditions per place. [2024-06-20 16:21:45,455 INFO L140 encePairwiseOnDemand]: 44/53 looper letters, 45 selfloop transitions, 5 changer transitions 0/57 dead transitions. [2024-06-20 16:21:45,455 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 57 transitions, 235 flow [2024-06-20 16:21:45,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-20 16:21:45,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-20 16:21:45,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 96 transitions. [2024-06-20 16:21:45,465 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6037735849056604 [2024-06-20 16:21:45,466 INFO L175 Difference]: Start difference. First operand has 56 places, 43 transitions, 98 flow. Second operand 3 states and 96 transitions. [2024-06-20 16:21:45,467 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 57 transitions, 235 flow [2024-06-20 16:21:45,469 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 57 transitions, 228 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-06-20 16:21:45,474 INFO L231 Difference]: Finished difference. Result has 55 places, 47 transitions, 133 flow [2024-06-20 16:21:45,475 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=94, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=133, PETRI_PLACES=55, PETRI_TRANSITIONS=47} [2024-06-20 16:21:45,478 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, -1 predicate places. [2024-06-20 16:21:45,478 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 47 transitions, 133 flow [2024-06-20 16:21:45,478 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 15.333333333333334) internal successors, (46), 3 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:21:45,479 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:21:45,479 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:21:45,479 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-20 16:21:45,479 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-20 16:21:45,479 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:21:45,480 INFO L85 PathProgramCache]: Analyzing trace with hash -712681370, now seen corresponding path program 1 times [2024-06-20 16:21:45,480 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:21:45,480 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [18054279] [2024-06-20 16:21:45,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:21:45,480 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:21:45,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:21:46,173 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:21:46,173 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:21:46,174 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [18054279] [2024-06-20 16:21:46,174 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [18054279] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:21:46,174 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:21:46,175 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-20 16:21:46,175 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1301802842] [2024-06-20 16:21:46,175 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:21:46,176 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-20 16:21:46,176 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:21:46,177 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-20 16:21:46,177 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-06-20 16:21:46,233 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 53 [2024-06-20 16:21:46,234 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 47 transitions, 133 flow. Second operand has 4 states, 4 states have (on average 15.25) internal successors, (61), 4 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:21:46,234 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:21:46,234 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 53 [2024-06-20 16:21:46,235 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:21:48,128 INFO L124 PetriNetUnfolderBase]: 13321/18425 cut-off events. [2024-06-20 16:21:48,129 INFO L125 PetriNetUnfolderBase]: For 3250/3250 co-relation queries the response was YES. [2024-06-20 16:21:48,145 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41334 conditions, 18425 events. 13321/18425 cut-off events. For 3250/3250 co-relation queries the response was YES. Maximal size of possible extension queue 616. Compared 101256 event pairs, 9607 based on Foata normal form. 4/18211 useless extension candidates. Maximal degree in co-relation 41322. Up to 17950 conditions per place. [2024-06-20 16:21:48,198 INFO L140 encePairwiseOnDemand]: 43/53 looper letters, 55 selfloop transitions, 9 changer transitions 0/71 dead transitions. [2024-06-20 16:21:48,198 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 71 transitions, 327 flow [2024-06-20 16:21:48,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-20 16:21:48,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-20 16:21:48,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 124 transitions. [2024-06-20 16:21:48,200 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5849056603773585 [2024-06-20 16:21:48,200 INFO L175 Difference]: Start difference. First operand has 55 places, 47 transitions, 133 flow. Second operand 4 states and 124 transitions. [2024-06-20 16:21:48,200 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 71 transitions, 327 flow [2024-06-20 16:21:48,206 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 71 transitions, 322 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-20 16:21:48,206 INFO L231 Difference]: Finished difference. Result has 58 places, 51 transitions, 181 flow [2024-06-20 16:21:48,207 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=128, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=181, PETRI_PLACES=58, PETRI_TRANSITIONS=51} [2024-06-20 16:21:48,207 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 2 predicate places. [2024-06-20 16:21:48,208 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 51 transitions, 181 flow [2024-06-20 16:21:48,208 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.25) internal successors, (61), 4 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:21:48,208 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:21:48,208 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:21:48,208 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-20 16:21:48,208 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-20 16:21:48,209 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:21:48,209 INFO L85 PathProgramCache]: Analyzing trace with hash -618284250, now seen corresponding path program 1 times [2024-06-20 16:21:48,209 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:21:48,209 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [482908552] [2024-06-20 16:21:48,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:21:48,210 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:21:48,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:21:48,912 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:21:48,912 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:21:48,913 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [482908552] [2024-06-20 16:21:48,913 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [482908552] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:21:48,913 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:21:48,913 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-20 16:21:48,913 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1438702630] [2024-06-20 16:21:48,913 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:21:48,914 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-20 16:21:48,914 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:21:48,914 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-20 16:21:48,914 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-06-20 16:21:49,038 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 53 [2024-06-20 16:21:49,039 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 51 transitions, 181 flow. Second operand has 5 states, 5 states have (on average 15.2) internal successors, (76), 5 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:21:49,039 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:21:49,039 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 53 [2024-06-20 16:21:49,039 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:21:50,956 INFO L124 PetriNetUnfolderBase]: 13339/18519 cut-off events. [2024-06-20 16:21:50,956 INFO L125 PetriNetUnfolderBase]: For 9399/9399 co-relation queries the response was YES. [2024-06-20 16:21:50,982 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45920 conditions, 18519 events. 13339/18519 cut-off events. For 9399/9399 co-relation queries the response was YES. Maximal size of possible extension queue 616. Compared 102567 event pairs, 8101 based on Foata normal form. 7/18322 useless extension candidates. Maximal degree in co-relation 45906. Up to 17871 conditions per place. [2024-06-20 16:21:51,052 INFO L140 encePairwiseOnDemand]: 41/53 looper letters, 73 selfloop transitions, 21 changer transitions 0/101 dead transitions. [2024-06-20 16:21:51,053 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 101 transitions, 543 flow [2024-06-20 16:21:51,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-20 16:21:51,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-20 16:21:51,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 162 transitions. [2024-06-20 16:21:51,055 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6113207547169811 [2024-06-20 16:21:51,055 INFO L175 Difference]: Start difference. First operand has 58 places, 51 transitions, 181 flow. Second operand 5 states and 162 transitions. [2024-06-20 16:21:51,055 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 101 transitions, 543 flow [2024-06-20 16:21:51,057 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 101 transitions, 524 flow, removed 3 selfloop flow, removed 2 redundant places. [2024-06-20 16:21:51,059 INFO L231 Difference]: Finished difference. Result has 63 places, 65 transitions, 312 flow [2024-06-20 16:21:51,059 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=162, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=312, PETRI_PLACES=63, PETRI_TRANSITIONS=65} [2024-06-20 16:21:51,060 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 7 predicate places. [2024-06-20 16:21:51,060 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 65 transitions, 312 flow [2024-06-20 16:21:51,060 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 15.2) internal successors, (76), 5 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:21:51,060 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:21:51,060 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:21:51,060 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-20 16:21:51,061 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-20 16:21:51,061 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:21:51,061 INFO L85 PathProgramCache]: Analyzing trace with hash 1255212561, now seen corresponding path program 1 times [2024-06-20 16:21:51,061 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:21:51,061 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1631906673] [2024-06-20 16:21:51,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:21:51,062 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:21:51,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:21:52,089 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:21:52,090 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:21:52,092 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1631906673] [2024-06-20 16:21:52,093 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1631906673] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:21:52,093 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:21:52,093 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-20 16:21:52,093 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1640260695] [2024-06-20 16:21:52,094 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:21:52,094 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-20 16:21:52,094 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:21:52,095 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-20 16:21:52,095 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-20 16:21:52,153 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 53 [2024-06-20 16:21:52,155 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 65 transitions, 312 flow. Second operand has 6 states, 6 states have (on average 15.166666666666666) internal successors, (91), 6 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:21:52,155 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:21:52,155 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 53 [2024-06-20 16:21:52,155 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:21:54,118 INFO L124 PetriNetUnfolderBase]: 13357/18543 cut-off events. [2024-06-20 16:21:54,119 INFO L125 PetriNetUnfolderBase]: For 22035/22040 co-relation queries the response was YES. [2024-06-20 16:21:54,151 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52899 conditions, 18543 events. 13357/18543 cut-off events. For 22035/22040 co-relation queries the response was YES. Maximal size of possible extension queue 616. Compared 102603 event pairs, 7192 based on Foata normal form. 11/18350 useless extension candidates. Maximal degree in co-relation 52882. Up to 17857 conditions per place. [2024-06-20 16:21:54,231 INFO L140 encePairwiseOnDemand]: 40/53 looper letters, 83 selfloop transitions, 26 changer transitions 0/116 dead transitions. [2024-06-20 16:21:54,232 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 116 transitions, 712 flow [2024-06-20 16:21:54,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 16:21:54,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 16:21:54,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 191 transitions. [2024-06-20 16:21:54,236 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.60062893081761 [2024-06-20 16:21:54,236 INFO L175 Difference]: Start difference. First operand has 63 places, 65 transitions, 312 flow. Second operand 6 states and 191 transitions. [2024-06-20 16:21:54,236 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 116 transitions, 712 flow [2024-06-20 16:21:54,244 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 116 transitions, 700 flow, removed 6 selfloop flow, removed 0 redundant places. [2024-06-20 16:21:54,246 INFO L231 Difference]: Finished difference. Result has 69 places, 70 transitions, 406 flow [2024-06-20 16:21:54,246 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=300, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=406, PETRI_PLACES=69, PETRI_TRANSITIONS=70} [2024-06-20 16:21:54,247 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 13 predicate places. [2024-06-20 16:21:54,247 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 70 transitions, 406 flow [2024-06-20 16:21:54,248 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.166666666666666) internal successors, (91), 6 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:21:54,248 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:21:54,248 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:21:54,248 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-20 16:21:54,248 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-20 16:21:54,249 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:21:54,249 INFO L85 PathProgramCache]: Analyzing trace with hash 256885529, now seen corresponding path program 1 times [2024-06-20 16:21:54,249 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:21:54,249 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [834015150] [2024-06-20 16:21:54,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:21:54,249 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:21:54,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:21:55,296 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:21:55,297 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:21:55,297 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [834015150] [2024-06-20 16:21:55,297 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [834015150] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:21:55,297 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:21:55,297 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 16:21:55,297 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [779648562] [2024-06-20 16:21:55,297 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:21:55,298 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 16:21:55,298 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:21:55,298 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 16:21:55,298 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2024-06-20 16:21:55,392 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 53 [2024-06-20 16:21:55,393 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 70 transitions, 406 flow. Second operand has 7 states, 7 states have (on average 15.142857142857142) internal successors, (106), 7 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:21:55,393 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:21:55,393 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 53 [2024-06-20 16:21:55,393 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:21:57,130 INFO L124 PetriNetUnfolderBase]: 13386/18590 cut-off events. [2024-06-20 16:21:57,130 INFO L125 PetriNetUnfolderBase]: For 34918/34923 co-relation queries the response was YES. [2024-06-20 16:21:57,175 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58370 conditions, 18590 events. 13386/18590 cut-off events. For 34918/34923 co-relation queries the response was YES. Maximal size of possible extension queue 616. Compared 102930 event pairs, 6153 based on Foata normal form. 18/18404 useless extension candidates. Maximal degree in co-relation 58350. Up to 17822 conditions per place. [2024-06-20 16:21:57,246 INFO L140 encePairwiseOnDemand]: 40/53 looper letters, 90 selfloop transitions, 30 changer transitions 0/127 dead transitions. [2024-06-20 16:21:57,247 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 127 transitions, 856 flow [2024-06-20 16:21:57,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 16:21:57,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 16:21:57,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 216 transitions. [2024-06-20 16:21:57,248 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5822102425876011 [2024-06-20 16:21:57,248 INFO L175 Difference]: Start difference. First operand has 69 places, 70 transitions, 406 flow. Second operand 7 states and 216 transitions. [2024-06-20 16:21:57,248 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 127 transitions, 856 flow [2024-06-20 16:21:57,259 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 127 transitions, 790 flow, removed 10 selfloop flow, removed 4 redundant places. [2024-06-20 16:21:57,261 INFO L231 Difference]: Finished difference. Result has 71 places, 73 transitions, 445 flow [2024-06-20 16:21:57,261 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=330, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=445, PETRI_PLACES=71, PETRI_TRANSITIONS=73} [2024-06-20 16:21:57,261 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 15 predicate places. [2024-06-20 16:21:57,262 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 73 transitions, 445 flow [2024-06-20 16:21:57,262 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.142857142857142) internal successors, (106), 7 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:21:57,262 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:21:57,262 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:21:57,262 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-20 16:21:57,262 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-20 16:21:57,263 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:21:57,263 INFO L85 PathProgramCache]: Analyzing trace with hash -890928937, now seen corresponding path program 1 times [2024-06-20 16:21:57,263 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:21:57,263 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [15707699] [2024-06-20 16:21:57,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:21:57,264 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:21:57,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:21:57,948 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:21:57,948 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:21:57,948 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [15707699] [2024-06-20 16:21:57,949 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [15707699] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:21:57,949 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:21:57,949 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-20 16:21:57,949 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1287956705] [2024-06-20 16:21:57,949 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:21:57,949 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-20 16:21:57,949 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:21:57,950 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-20 16:21:57,950 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-06-20 16:21:58,013 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 53 [2024-06-20 16:21:58,014 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 73 transitions, 445 flow. Second operand has 6 states, 6 states have (on average 13.5) internal successors, (81), 6 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:21:58,014 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:21:58,014 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 53 [2024-06-20 16:21:58,014 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:21:59,744 INFO L124 PetriNetUnfolderBase]: 13377/18558 cut-off events. [2024-06-20 16:21:59,744 INFO L125 PetriNetUnfolderBase]: For 49374/49374 co-relation queries the response was YES. [2024-06-20 16:21:59,785 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62614 conditions, 18558 events. 13377/18558 cut-off events. For 49374/49374 co-relation queries the response was YES. Maximal size of possible extension queue 615. Compared 102549 event pairs, 7117 based on Foata normal form. 3/18349 useless extension candidates. Maximal degree in co-relation 62592. Up to 18037 conditions per place. [2024-06-20 16:21:59,851 INFO L140 encePairwiseOnDemand]: 43/53 looper letters, 74 selfloop transitions, 10 changer transitions 0/90 dead transitions. [2024-06-20 16:21:59,851 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 90 transitions, 657 flow [2024-06-20 16:21:59,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-20 16:21:59,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-20 16:21:59,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 124 transitions. [2024-06-20 16:21:59,852 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4679245283018868 [2024-06-20 16:21:59,852 INFO L175 Difference]: Start difference. First operand has 71 places, 73 transitions, 445 flow. Second operand 5 states and 124 transitions. [2024-06-20 16:21:59,852 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 90 transitions, 657 flow [2024-06-20 16:21:59,864 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 90 transitions, 570 flow, removed 16 selfloop flow, removed 5 redundant places. [2024-06-20 16:21:59,865 INFO L231 Difference]: Finished difference. Result has 71 places, 73 transitions, 389 flow [2024-06-20 16:21:59,866 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=358, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=389, PETRI_PLACES=71, PETRI_TRANSITIONS=73} [2024-06-20 16:21:59,866 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 15 predicate places. [2024-06-20 16:21:59,866 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 73 transitions, 389 flow [2024-06-20 16:21:59,866 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.5) internal successors, (81), 6 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:21:59,867 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:21:59,867 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:21:59,867 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-20 16:21:59,867 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-20 16:21:59,867 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:21:59,867 INFO L85 PathProgramCache]: Analyzing trace with hash -1876696885, now seen corresponding path program 1 times [2024-06-20 16:21:59,867 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:21:59,868 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [416850976] [2024-06-20 16:21:59,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:21:59,868 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:21:59,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:22:00,698 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:22:00,698 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:22:00,698 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [416850976] [2024-06-20 16:22:00,699 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [416850976] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:22:00,699 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:22:00,699 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 16:22:00,699 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1233766158] [2024-06-20 16:22:00,699 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:22:00,699 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 16:22:00,699 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:22:00,700 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 16:22:00,700 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-20 16:22:00,776 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 53 [2024-06-20 16:22:00,777 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 73 transitions, 389 flow. Second operand has 7 states, 7 states have (on average 13.428571428571429) internal successors, (94), 7 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:22:00,777 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:22:00,777 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 53 [2024-06-20 16:22:00,777 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:22:02,695 INFO L124 PetriNetUnfolderBase]: 13443/18866 cut-off events. [2024-06-20 16:22:02,696 INFO L125 PetriNetUnfolderBase]: For 58024/58024 co-relation queries the response was YES. [2024-06-20 16:22:02,746 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64045 conditions, 18866 events. 13443/18866 cut-off events. For 58024/58024 co-relation queries the response was YES. Maximal size of possible extension queue 624. Compared 106347 event pairs, 6711 based on Foata normal form. 14/18856 useless extension candidates. Maximal degree in co-relation 64021. Up to 17913 conditions per place. [2024-06-20 16:22:02,821 INFO L140 encePairwiseOnDemand]: 41/53 looper letters, 92 selfloop transitions, 22 changer transitions 0/120 dead transitions. [2024-06-20 16:22:02,822 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 120 transitions, 841 flow [2024-06-20 16:22:02,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 16:22:02,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 16:22:02,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 160 transitions. [2024-06-20 16:22:02,823 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5031446540880503 [2024-06-20 16:22:02,823 INFO L175 Difference]: Start difference. First operand has 71 places, 73 transitions, 389 flow. Second operand 6 states and 160 transitions. [2024-06-20 16:22:02,823 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 120 transitions, 841 flow [2024-06-20 16:22:02,840 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 120 transitions, 812 flow, removed 3 selfloop flow, removed 4 redundant places. [2024-06-20 16:22:02,841 INFO L231 Difference]: Finished difference. Result has 75 places, 87 transitions, 546 flow [2024-06-20 16:22:02,842 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=360, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=546, PETRI_PLACES=75, PETRI_TRANSITIONS=87} [2024-06-20 16:22:02,842 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 19 predicate places. [2024-06-20 16:22:02,842 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 87 transitions, 546 flow [2024-06-20 16:22:02,843 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.428571428571429) internal successors, (94), 7 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:22:02,843 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:22:02,843 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:22:02,843 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-20 16:22:02,843 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-20 16:22:02,843 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:22:02,844 INFO L85 PathProgramCache]: Analyzing trace with hash 1946218900, now seen corresponding path program 1 times [2024-06-20 16:22:02,844 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:22:02,844 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2070628463] [2024-06-20 16:22:02,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:22:02,844 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:22:02,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:22:03,726 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:22:03,726 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:22:03,726 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2070628463] [2024-06-20 16:22:03,727 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2070628463] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:22:03,727 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:22:03,727 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 16:22:03,727 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [365252197] [2024-06-20 16:22:03,727 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:22:03,727 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 16:22:03,728 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:22:03,728 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 16:22:03,728 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-20 16:22:03,826 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 53 [2024-06-20 16:22:03,826 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 87 transitions, 546 flow. Second operand has 7 states, 7 states have (on average 13.428571428571429) internal successors, (94), 7 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:22:03,826 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:22:03,826 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 53 [2024-06-20 16:22:03,826 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:22:05,543 INFO L124 PetriNetUnfolderBase]: 13456/18890 cut-off events. [2024-06-20 16:22:05,543 INFO L125 PetriNetUnfolderBase]: For 81432/81442 co-relation queries the response was YES. [2024-06-20 16:22:05,590 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71121 conditions, 18890 events. 13456/18890 cut-off events. For 81432/81442 co-relation queries the response was YES. Maximal size of possible extension queue 625. Compared 106456 event pairs, 6894 based on Foata normal form. 14/18879 useless extension candidates. Maximal degree in co-relation 71095. Up to 18027 conditions per place. [2024-06-20 16:22:05,664 INFO L140 encePairwiseOnDemand]: 41/53 looper letters, 90 selfloop transitions, 25 changer transitions 0/121 dead transitions. [2024-06-20 16:22:05,665 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 121 transitions, 925 flow [2024-06-20 16:22:05,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 16:22:05,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 16:22:05,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 157 transitions. [2024-06-20 16:22:05,666 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4937106918238994 [2024-06-20 16:22:05,666 INFO L175 Difference]: Start difference. First operand has 75 places, 87 transitions, 546 flow. Second operand 6 states and 157 transitions. [2024-06-20 16:22:05,666 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 121 transitions, 925 flow [2024-06-20 16:22:05,703 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 121 transitions, 897 flow, removed 13 selfloop flow, removed 1 redundant places. [2024-06-20 16:22:05,705 INFO L231 Difference]: Finished difference. Result has 80 places, 91 transitions, 614 flow [2024-06-20 16:22:05,705 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=518, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=87, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=614, PETRI_PLACES=80, PETRI_TRANSITIONS=91} [2024-06-20 16:22:05,706 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 24 predicate places. [2024-06-20 16:22:05,706 INFO L495 AbstractCegarLoop]: Abstraction has has 80 places, 91 transitions, 614 flow [2024-06-20 16:22:05,706 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.428571428571429) internal successors, (94), 7 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:22:05,706 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:22:05,706 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:22:05,706 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-20 16:22:05,707 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-20 16:22:05,707 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:22:05,707 INFO L85 PathProgramCache]: Analyzing trace with hash -1484159946, now seen corresponding path program 2 times [2024-06-20 16:22:05,707 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:22:05,707 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [25771637] [2024-06-20 16:22:05,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:22:05,708 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:22:05,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:22:06,517 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:22:06,517 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:22:06,517 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [25771637] [2024-06-20 16:22:06,517 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [25771637] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:22:06,517 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:22:06,517 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 16:22:06,517 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1347515005] [2024-06-20 16:22:06,517 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:22:06,518 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 16:22:06,518 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:22:06,518 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 16:22:06,518 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-20 16:22:06,622 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 53 [2024-06-20 16:22:06,622 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 91 transitions, 614 flow. Second operand has 7 states, 7 states have (on average 13.428571428571429) internal successors, (94), 7 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:22:06,622 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:22:06,623 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 53 [2024-06-20 16:22:06,623 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:22:08,621 INFO L124 PetriNetUnfolderBase]: 13426/18843 cut-off events. [2024-06-20 16:22:08,621 INFO L125 PetriNetUnfolderBase]: For 89766/89766 co-relation queries the response was YES. [2024-06-20 16:22:08,645 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71710 conditions, 18843 events. 13426/18843 cut-off events. For 89766/89766 co-relation queries the response was YES. Maximal size of possible extension queue 625. Compared 106299 event pairs, 6887 based on Foata normal form. 3/18822 useless extension candidates. Maximal degree in co-relation 71681. Up to 18083 conditions per place. [2024-06-20 16:22:08,702 INFO L140 encePairwiseOnDemand]: 42/53 looper letters, 95 selfloop transitions, 14 changer transitions 0/115 dead transitions. [2024-06-20 16:22:08,702 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 115 transitions, 894 flow [2024-06-20 16:22:08,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 16:22:08,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 16:22:08,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 147 transitions. [2024-06-20 16:22:08,704 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46226415094339623 [2024-06-20 16:22:08,704 INFO L175 Difference]: Start difference. First operand has 80 places, 91 transitions, 614 flow. Second operand 6 states and 147 transitions. [2024-06-20 16:22:08,704 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 115 transitions, 894 flow [2024-06-20 16:22:08,734 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 115 transitions, 851 flow, removed 7 selfloop flow, removed 3 redundant places. [2024-06-20 16:22:08,736 INFO L231 Difference]: Finished difference. Result has 83 places, 91 transitions, 610 flow [2024-06-20 16:22:08,736 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=571, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=91, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=77, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=610, PETRI_PLACES=83, PETRI_TRANSITIONS=91} [2024-06-20 16:22:08,736 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 27 predicate places. [2024-06-20 16:22:08,737 INFO L495 AbstractCegarLoop]: Abstraction has has 83 places, 91 transitions, 610 flow [2024-06-20 16:22:08,737 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.428571428571429) internal successors, (94), 7 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:22:08,737 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:22:08,737 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:22:08,737 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-20 16:22:08,737 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-20 16:22:08,738 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:22:08,738 INFO L85 PathProgramCache]: Analyzing trace with hash 203245772, now seen corresponding path program 1 times [2024-06-20 16:22:08,738 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:22:08,738 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [604707806] [2024-06-20 16:22:08,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:22:08,738 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:22:08,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:22:09,601 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:22:09,602 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:22:09,602 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [604707806] [2024-06-20 16:22:09,602 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [604707806] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:22:09,602 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:22:09,602 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 16:22:09,602 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [950333518] [2024-06-20 16:22:09,603 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:22:09,603 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 16:22:09,603 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:22:09,603 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 16:22:09,604 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-20 16:22:09,705 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 53 [2024-06-20 16:22:09,705 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 91 transitions, 610 flow. Second operand has 8 states, 8 states have (on average 13.375) internal successors, (107), 8 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:22:09,705 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:22:09,705 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 53 [2024-06-20 16:22:09,705 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:22:11,795 INFO L124 PetriNetUnfolderBase]: 14250/19875 cut-off events. [2024-06-20 16:22:11,795 INFO L125 PetriNetUnfolderBase]: For 108177/108183 co-relation queries the response was YES. [2024-06-20 16:22:11,830 INFO L83 FinitePrefix]: Finished finitePrefix Result has 77461 conditions, 19875 events. 14250/19875 cut-off events. For 108177/108183 co-relation queries the response was YES. Maximal size of possible extension queue 614. Compared 110971 event pairs, 5968 based on Foata normal form. 29/19865 useless extension candidates. Maximal degree in co-relation 77431. Up to 18100 conditions per place. [2024-06-20 16:22:11,897 INFO L140 encePairwiseOnDemand]: 37/53 looper letters, 122 selfloop transitions, 41 changer transitions 0/169 dead transitions. [2024-06-20 16:22:11,898 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 169 transitions, 1430 flow [2024-06-20 16:22:11,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 16:22:11,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 16:22:11,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 198 transitions. [2024-06-20 16:22:11,899 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5336927223719676 [2024-06-20 16:22:11,899 INFO L175 Difference]: Start difference. First operand has 83 places, 91 transitions, 610 flow. Second operand 7 states and 198 transitions. [2024-06-20 16:22:11,899 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 169 transitions, 1430 flow [2024-06-20 16:22:11,932 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 169 transitions, 1370 flow, removed 4 selfloop flow, removed 6 redundant places. [2024-06-20 16:22:11,934 INFO L231 Difference]: Finished difference. Result has 87 places, 116 transitions, 916 flow [2024-06-20 16:22:11,934 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=550, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=91, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=916, PETRI_PLACES=87, PETRI_TRANSITIONS=116} [2024-06-20 16:22:11,935 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 31 predicate places. [2024-06-20 16:22:11,935 INFO L495 AbstractCegarLoop]: Abstraction has has 87 places, 116 transitions, 916 flow [2024-06-20 16:22:11,935 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.375) internal successors, (107), 8 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:22:11,935 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:22:11,935 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:22:11,935 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-20 16:22:11,935 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-20 16:22:11,936 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:22:11,936 INFO L85 PathProgramCache]: Analyzing trace with hash 1235921096, now seen corresponding path program 2 times [2024-06-20 16:22:11,936 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:22:11,936 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1262875221] [2024-06-20 16:22:11,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:22:11,936 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:22:11,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:22:12,756 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:22:12,756 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:22:12,757 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1262875221] [2024-06-20 16:22:12,757 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1262875221] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:22:12,757 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:22:12,757 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 16:22:12,757 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1856015729] [2024-06-20 16:22:12,757 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:22:12,757 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 16:22:12,758 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:22:12,758 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 16:22:12,758 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-20 16:22:12,837 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 53 [2024-06-20 16:22:12,837 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 116 transitions, 916 flow. Second operand has 8 states, 8 states have (on average 13.375) internal successors, (107), 8 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:22:12,837 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:22:12,837 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 53 [2024-06-20 16:22:12,837 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:22:15,335 INFO L124 PetriNetUnfolderBase]: 14378/20100 cut-off events. [2024-06-20 16:22:15,335 INFO L125 PetriNetUnfolderBase]: For 148454/148454 co-relation queries the response was YES. [2024-06-20 16:22:15,391 INFO L83 FinitePrefix]: Finished finitePrefix Result has 90119 conditions, 20100 events. 14378/20100 cut-off events. For 148454/148454 co-relation queries the response was YES. Maximal size of possible extension queue 621. Compared 112765 event pairs, 6417 based on Foata normal form. 14/20067 useless extension candidates. Maximal degree in co-relation 90085. Up to 19211 conditions per place. [2024-06-20 16:22:15,483 INFO L140 encePairwiseOnDemand]: 38/53 looper letters, 131 selfloop transitions, 27 changer transitions 0/164 dead transitions. [2024-06-20 16:22:15,484 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 164 transitions, 1514 flow [2024-06-20 16:22:15,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 16:22:15,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 16:22:15,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 181 transitions. [2024-06-20 16:22:15,485 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48787061994609165 [2024-06-20 16:22:15,485 INFO L175 Difference]: Start difference. First operand has 87 places, 116 transitions, 916 flow. Second operand 7 states and 181 transitions. [2024-06-20 16:22:15,485 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 164 transitions, 1514 flow [2024-06-20 16:22:15,570 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 164 transitions, 1456 flow, removed 28 selfloop flow, removed 1 redundant places. [2024-06-20 16:22:15,572 INFO L231 Difference]: Finished difference. Result has 96 places, 127 transitions, 1072 flow [2024-06-20 16:22:15,572 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=864, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=116, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=92, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1072, PETRI_PLACES=96, PETRI_TRANSITIONS=127} [2024-06-20 16:22:15,572 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 40 predicate places. [2024-06-20 16:22:15,573 INFO L495 AbstractCegarLoop]: Abstraction has has 96 places, 127 transitions, 1072 flow [2024-06-20 16:22:15,573 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.375) internal successors, (107), 8 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:22:15,573 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:22:15,573 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:22:15,573 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-20 16:22:15,573 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-20 16:22:15,574 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:22:15,574 INFO L85 PathProgramCache]: Analyzing trace with hash 380377292, now seen corresponding path program 3 times [2024-06-20 16:22:15,574 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:22:15,574 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [208088447] [2024-06-20 16:22:15,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:22:15,574 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:22:15,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:22:16,542 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:22:16,543 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:22:16,543 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [208088447] [2024-06-20 16:22:16,543 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [208088447] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:22:16,543 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:22:16,543 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 16:22:16,543 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1511730562] [2024-06-20 16:22:16,543 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:22:16,544 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 16:22:16,544 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:22:16,544 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 16:22:16,544 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-20 16:22:16,699 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 53 [2024-06-20 16:22:16,699 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 127 transitions, 1072 flow. Second operand has 8 states, 8 states have (on average 13.375) internal successors, (107), 8 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:22:16,699 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:22:16,699 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 53 [2024-06-20 16:22:16,699 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:22:19,326 INFO L124 PetriNetUnfolderBase]: 14444/20186 cut-off events. [2024-06-20 16:22:19,326 INFO L125 PetriNetUnfolderBase]: For 172097/172097 co-relation queries the response was YES. [2024-06-20 16:22:19,377 INFO L83 FinitePrefix]: Finished finitePrefix Result has 93444 conditions, 20186 events. 14444/20186 cut-off events. For 172097/172097 co-relation queries the response was YES. Maximal size of possible extension queue 621. Compared 113204 event pairs, 6396 based on Foata normal form. 14/20153 useless extension candidates. Maximal degree in co-relation 93404. Up to 19086 conditions per place. [2024-06-20 16:22:19,458 INFO L140 encePairwiseOnDemand]: 38/53 looper letters, 136 selfloop transitions, 36 changer transitions 0/178 dead transitions. [2024-06-20 16:22:19,459 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 102 places, 178 transitions, 1772 flow [2024-06-20 16:22:19,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 16:22:19,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 16:22:19,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 186 transitions. [2024-06-20 16:22:19,473 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5013477088948787 [2024-06-20 16:22:19,473 INFO L175 Difference]: Start difference. First operand has 96 places, 127 transitions, 1072 flow. Second operand 7 states and 186 transitions. [2024-06-20 16:22:19,474 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 102 places, 178 transitions, 1772 flow [2024-06-20 16:22:19,557 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 99 places, 178 transitions, 1702 flow, removed 16 selfloop flow, removed 3 redundant places. [2024-06-20 16:22:19,563 INFO L231 Difference]: Finished difference. Result has 101 places, 137 transitions, 1231 flow [2024-06-20 16:22:19,563 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=1002, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=127, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=95, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1231, PETRI_PLACES=101, PETRI_TRANSITIONS=137} [2024-06-20 16:22:19,565 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 45 predicate places. [2024-06-20 16:22:19,565 INFO L495 AbstractCegarLoop]: Abstraction has has 101 places, 137 transitions, 1231 flow [2024-06-20 16:22:19,566 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.375) internal successors, (107), 8 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:22:19,566 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:22:19,566 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:22:19,566 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-20 16:22:19,566 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-20 16:22:19,567 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:22:19,567 INFO L85 PathProgramCache]: Analyzing trace with hash 380623370, now seen corresponding path program 1 times [2024-06-20 16:22:19,567 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:22:19,567 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1769561696] [2024-06-20 16:22:19,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:22:19,567 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:22:19,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:22:20,909 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:22:20,909 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:22:20,909 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1769561696] [2024-06-20 16:22:20,909 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1769561696] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:22:20,909 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:22:20,910 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:22:20,910 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1798864300] [2024-06-20 16:22:20,910 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:22:20,910 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:22:20,910 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:22:20,911 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:22:20,911 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:22:21,053 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 53 [2024-06-20 16:22:21,054 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 101 places, 137 transitions, 1231 flow. Second operand has 9 states, 9 states have (on average 13.333333333333334) internal successors, (120), 9 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:22:21,054 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:22:21,054 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 53 [2024-06-20 16:22:21,054 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:22:23,923 INFO L124 PetriNetUnfolderBase]: 14625/20440 cut-off events. [2024-06-20 16:22:23,924 INFO L125 PetriNetUnfolderBase]: For 204907/204907 co-relation queries the response was YES. [2024-06-20 16:22:23,966 INFO L83 FinitePrefix]: Finished finitePrefix Result has 98476 conditions, 20440 events. 14625/20440 cut-off events. For 204907/204907 co-relation queries the response was YES. Maximal size of possible extension queue 620. Compared 114844 event pairs, 6271 based on Foata normal form. 30/20420 useless extension candidates. Maximal degree in co-relation 98434. Up to 19275 conditions per place. [2024-06-20 16:22:24,042 INFO L140 encePairwiseOnDemand]: 41/53 looper letters, 145 selfloop transitions, 34 changer transitions 0/185 dead transitions. [2024-06-20 16:22:24,042 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 107 places, 185 transitions, 1855 flow [2024-06-20 16:22:24,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 16:22:24,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 16:22:24,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 188 transitions. [2024-06-20 16:22:24,043 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5067385444743935 [2024-06-20 16:22:24,044 INFO L175 Difference]: Start difference. First operand has 101 places, 137 transitions, 1231 flow. Second operand 7 states and 188 transitions. [2024-06-20 16:22:24,044 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 107 places, 185 transitions, 1855 flow [2024-06-20 16:22:24,139 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 104 places, 185 transitions, 1785 flow, removed 24 selfloop flow, removed 3 redundant places. [2024-06-20 16:22:24,141 INFO L231 Difference]: Finished difference. Result has 105 places, 140 transitions, 1288 flow [2024-06-20 16:22:24,141 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=1161, PETRI_DIFFERENCE_MINUEND_PLACES=98, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=137, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=103, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1288, PETRI_PLACES=105, PETRI_TRANSITIONS=140} [2024-06-20 16:22:24,141 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 49 predicate places. [2024-06-20 16:22:24,142 INFO L495 AbstractCegarLoop]: Abstraction has has 105 places, 140 transitions, 1288 flow [2024-06-20 16:22:24,142 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.333333333333334) internal successors, (120), 9 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:22:24,142 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:22:24,142 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:22:24,142 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-20 16:22:24,142 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-20 16:22:24,143 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:22:24,143 INFO L85 PathProgramCache]: Analyzing trace with hash -1032241636, now seen corresponding path program 1 times [2024-06-20 16:22:24,143 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:22:24,143 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1841185914] [2024-06-20 16:22:24,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:22:24,143 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:22:24,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:22:24,780 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:22:24,780 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:22:24,780 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1841185914] [2024-06-20 16:22:24,780 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1841185914] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:22:24,780 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:22:24,781 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-20 16:22:24,781 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [26578607] [2024-06-20 16:22:24,781 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:22:24,781 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-20 16:22:24,781 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:22:24,781 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-20 16:22:24,781 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-06-20 16:22:24,856 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 53 [2024-06-20 16:22:24,857 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 105 places, 140 transitions, 1288 flow. Second operand has 6 states, 6 states have (on average 14.0) internal successors, (84), 6 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:22:24,857 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:22:24,857 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 53 [2024-06-20 16:22:24,857 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:22:27,145 INFO L124 PetriNetUnfolderBase]: 14611/20428 cut-off events. [2024-06-20 16:22:27,146 INFO L125 PetriNetUnfolderBase]: For 228447/228447 co-relation queries the response was YES. [2024-06-20 16:22:27,238 INFO L83 FinitePrefix]: Finished finitePrefix Result has 101766 conditions, 20428 events. 14611/20428 cut-off events. For 228447/228447 co-relation queries the response was YES. Maximal size of possible extension queue 622. Compared 114822 event pairs, 6435 based on Foata normal form. 4/20384 useless extension candidates. Maximal degree in co-relation 101722. Up to 19684 conditions per place. [2024-06-20 16:22:27,331 INFO L140 encePairwiseOnDemand]: 44/53 looper letters, 135 selfloop transitions, 13 changer transitions 0/154 dead transitions. [2024-06-20 16:22:27,331 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 109 places, 154 transitions, 1620 flow [2024-06-20 16:22:27,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-20 16:22:27,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-20 16:22:27,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 121 transitions. [2024-06-20 16:22:27,333 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45660377358490567 [2024-06-20 16:22:27,333 INFO L175 Difference]: Start difference. First operand has 105 places, 140 transitions, 1288 flow. Second operand 5 states and 121 transitions. [2024-06-20 16:22:27,333 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 109 places, 154 transitions, 1620 flow [2024-06-20 16:22:27,465 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 104 places, 154 transitions, 1499 flow, removed 29 selfloop flow, removed 5 redundant places. [2024-06-20 16:22:27,467 INFO L231 Difference]: Finished difference. Result has 105 places, 140 transitions, 1205 flow [2024-06-20 16:22:27,468 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=1167, PETRI_DIFFERENCE_MINUEND_PLACES=100, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=140, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=127, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1205, PETRI_PLACES=105, PETRI_TRANSITIONS=140} [2024-06-20 16:22:27,468 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 49 predicate places. [2024-06-20 16:22:27,468 INFO L495 AbstractCegarLoop]: Abstraction has has 105 places, 140 transitions, 1205 flow [2024-06-20 16:22:27,468 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 14.0) internal successors, (84), 6 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:22:27,469 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:22:27,469 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:22:27,469 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-20 16:22:27,469 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-20 16:22:27,469 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:22:27,469 INFO L85 PathProgramCache]: Analyzing trace with hash 1869799235, now seen corresponding path program 1 times [2024-06-20 16:22:27,469 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:22:27,470 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [44046785] [2024-06-20 16:22:27,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:22:27,470 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:22:27,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:22:28,561 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:22:28,562 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:22:28,562 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [44046785] [2024-06-20 16:22:28,562 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [44046785] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:22:28,562 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:22:28,562 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 16:22:28,562 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [414399935] [2024-06-20 16:22:28,562 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:22:28,562 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 16:22:28,562 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:22:28,563 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 16:22:28,563 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-20 16:22:28,668 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 53 [2024-06-20 16:22:28,668 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 105 places, 140 transitions, 1205 flow. Second operand has 8 states, 8 states have (on average 13.5) internal successors, (108), 8 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:22:28,668 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:22:28,668 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 53 [2024-06-20 16:22:28,669 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:22:31,732 INFO L124 PetriNetUnfolderBase]: 14602/20410 cut-off events. [2024-06-20 16:22:31,733 INFO L125 PetriNetUnfolderBase]: For 245572/245585 co-relation queries the response was YES. [2024-06-20 16:22:31,795 INFO L83 FinitePrefix]: Finished finitePrefix Result has 102346 conditions, 20410 events. 14602/20410 cut-off events. For 245572/245585 co-relation queries the response was YES. Maximal size of possible extension queue 621. Compared 114444 event pairs, 6306 based on Foata normal form. 13/20369 useless extension candidates. Maximal degree in co-relation 102301. Up to 19506 conditions per place. [2024-06-20 16:22:31,883 INFO L140 encePairwiseOnDemand]: 40/53 looper letters, 148 selfloop transitions, 34 changer transitions 0/188 dead transitions. [2024-06-20 16:22:31,883 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 112 places, 188 transitions, 1741 flow [2024-06-20 16:22:31,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:22:31,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:22:31,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 204 transitions. [2024-06-20 16:22:31,884 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4811320754716981 [2024-06-20 16:22:31,885 INFO L175 Difference]: Start difference. First operand has 105 places, 140 transitions, 1205 flow. Second operand 8 states and 204 transitions. [2024-06-20 16:22:31,885 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 112 places, 188 transitions, 1741 flow [2024-06-20 16:22:31,990 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 108 places, 188 transitions, 1692 flow, removed 10 selfloop flow, removed 4 redundant places. [2024-06-20 16:22:31,992 INFO L231 Difference]: Finished difference. Result has 109 places, 144 transitions, 1302 flow [2024-06-20 16:22:31,993 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=1156, PETRI_DIFFERENCE_MINUEND_PLACES=101, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=140, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=106, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1302, PETRI_PLACES=109, PETRI_TRANSITIONS=144} [2024-06-20 16:22:31,993 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 53 predicate places. [2024-06-20 16:22:31,993 INFO L495 AbstractCegarLoop]: Abstraction has has 109 places, 144 transitions, 1302 flow [2024-06-20 16:22:31,993 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.5) internal successors, (108), 8 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:22:31,993 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:22:31,994 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:22:31,994 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-20 16:22:31,994 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-20 16:22:31,994 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:22:31,994 INFO L85 PathProgramCache]: Analyzing trace with hash 1873608670, now seen corresponding path program 1 times [2024-06-20 16:22:31,994 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:22:31,994 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [414866461] [2024-06-20 16:22:31,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:22:31,995 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:22:32,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:22:33,054 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:22:33,055 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:22:33,055 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [414866461] [2024-06-20 16:22:33,055 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [414866461] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:22:33,055 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:22:33,055 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 16:22:33,055 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1119210649] [2024-06-20 16:22:33,056 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:22:33,056 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 16:22:33,056 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:22:33,056 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 16:22:33,057 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-20 16:22:33,153 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 53 [2024-06-20 16:22:33,153 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 109 places, 144 transitions, 1302 flow. Second operand has 8 states, 8 states have (on average 13.5) internal successors, (108), 8 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:22:33,153 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:22:33,153 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 53 [2024-06-20 16:22:33,154 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:22:36,186 INFO L124 PetriNetUnfolderBase]: 14730/20532 cut-off events. [2024-06-20 16:22:36,186 INFO L125 PetriNetUnfolderBase]: For 279716/279727 co-relation queries the response was YES. [2024-06-20 16:22:36,241 INFO L83 FinitePrefix]: Finished finitePrefix Result has 107589 conditions, 20532 events. 14730/20532 cut-off events. For 279716/279727 co-relation queries the response was YES. Maximal size of possible extension queue 618. Compared 114779 event pairs, 5888 based on Foata normal form. 18/20480 useless extension candidates. Maximal degree in co-relation 107544. Up to 18518 conditions per place. [2024-06-20 16:22:36,323 INFO L140 encePairwiseOnDemand]: 37/53 looper letters, 135 selfloop transitions, 64 changer transitions 0/205 dead transitions. [2024-06-20 16:22:36,324 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 115 places, 205 transitions, 2208 flow [2024-06-20 16:22:36,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 16:22:36,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 16:22:36,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 200 transitions. [2024-06-20 16:22:36,325 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5390835579514824 [2024-06-20 16:22:36,325 INFO L175 Difference]: Start difference. First operand has 109 places, 144 transitions, 1302 flow. Second operand 7 states and 200 transitions. [2024-06-20 16:22:36,325 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 115 places, 205 transitions, 2208 flow [2024-06-20 16:22:36,437 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 109 places, 205 transitions, 2096 flow, removed 25 selfloop flow, removed 6 redundant places. [2024-06-20 16:22:36,439 INFO L231 Difference]: Finished difference. Result has 112 places, 154 transitions, 1540 flow [2024-06-20 16:22:36,439 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=1190, PETRI_DIFFERENCE_MINUEND_PLACES=103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=144, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=86, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1540, PETRI_PLACES=112, PETRI_TRANSITIONS=154} [2024-06-20 16:22:36,440 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 56 predicate places. [2024-06-20 16:22:36,440 INFO L495 AbstractCegarLoop]: Abstraction has has 112 places, 154 transitions, 1540 flow [2024-06-20 16:22:36,440 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.5) internal successors, (108), 8 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:22:36,440 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:22:36,440 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:22:36,440 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-20 16:22:36,441 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-20 16:22:36,441 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:22:36,441 INFO L85 PathProgramCache]: Analyzing trace with hash 1873614250, now seen corresponding path program 2 times [2024-06-20 16:22:36,441 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:22:36,441 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [107224454] [2024-06-20 16:22:36,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:22:36,442 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:22:36,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:22:37,256 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:22:37,256 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:22:37,256 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [107224454] [2024-06-20 16:22:37,256 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [107224454] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:22:37,257 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:22:37,257 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 16:22:37,257 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1242033586] [2024-06-20 16:22:37,257 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:22:37,257 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 16:22:37,257 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:22:37,258 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 16:22:37,258 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-20 16:22:37,362 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 53 [2024-06-20 16:22:37,362 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 112 places, 154 transitions, 1540 flow. Second operand has 8 states, 8 states have (on average 13.5) internal successors, (108), 8 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:22:37,362 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:22:37,362 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 53 [2024-06-20 16:22:37,362 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:22:40,230 INFO L124 PetriNetUnfolderBase]: 14858/20702 cut-off events. [2024-06-20 16:22:40,230 INFO L125 PetriNetUnfolderBase]: For 325634/325645 co-relation queries the response was YES. [2024-06-20 16:22:40,288 INFO L83 FinitePrefix]: Finished finitePrefix Result has 114350 conditions, 20702 events. 14858/20702 cut-off events. For 325634/325645 co-relation queries the response was YES. Maximal size of possible extension queue 618. Compared 115715 event pairs, 5811 based on Foata normal form. 18/20650 useless extension candidates. Maximal degree in co-relation 114302. Up to 18614 conditions per place. [2024-06-20 16:22:40,374 INFO L140 encePairwiseOnDemand]: 38/53 looper letters, 133 selfloop transitions, 66 changer transitions 0/205 dead transitions. [2024-06-20 16:22:40,374 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 118 places, 205 transitions, 2326 flow [2024-06-20 16:22:40,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 16:22:40,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 16:22:40,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 194 transitions. [2024-06-20 16:22:40,376 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.522911051212938 [2024-06-20 16:22:40,376 INFO L175 Difference]: Start difference. First operand has 112 places, 154 transitions, 1540 flow. Second operand 7 states and 194 transitions. [2024-06-20 16:22:40,376 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 118 places, 205 transitions, 2326 flow [2024-06-20 16:22:40,695 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 115 places, 205 transitions, 2194 flow, removed 33 selfloop flow, removed 3 redundant places. [2024-06-20 16:22:40,700 INFO L231 Difference]: Finished difference. Result has 116 places, 159 transitions, 1637 flow [2024-06-20 16:22:40,700 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=1418, PETRI_DIFFERENCE_MINUEND_PLACES=109, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=154, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=92, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1637, PETRI_PLACES=116, PETRI_TRANSITIONS=159} [2024-06-20 16:22:40,707 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 60 predicate places. [2024-06-20 16:22:40,707 INFO L495 AbstractCegarLoop]: Abstraction has has 116 places, 159 transitions, 1637 flow [2024-06-20 16:22:40,707 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.5) internal successors, (108), 8 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:22:40,707 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:22:40,707 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:22:40,708 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-20 16:22:40,708 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-20 16:22:40,708 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:22:40,708 INFO L85 PathProgramCache]: Analyzing trace with hash -340882731, now seen corresponding path program 1 times [2024-06-20 16:22:40,708 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:22:40,708 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [867169962] [2024-06-20 16:22:40,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:22:40,709 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:22:40,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:22:41,873 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:22:41,873 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:22:41,874 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [867169962] [2024-06-20 16:22:41,874 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [867169962] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:22:41,874 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:22:41,874 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:22:41,874 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2118722326] [2024-06-20 16:22:41,874 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:22:41,874 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:22:41,875 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:22:41,875 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:22:41,875 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:22:42,043 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 53 [2024-06-20 16:22:42,043 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 116 places, 159 transitions, 1637 flow. Second operand has 9 states, 9 states have (on average 13.333333333333334) internal successors, (120), 9 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:22:42,043 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:22:42,043 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 53 [2024-06-20 16:22:42,043 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:22:45,071 INFO L124 PetriNetUnfolderBase]: 14891/20773 cut-off events. [2024-06-20 16:22:45,072 INFO L125 PetriNetUnfolderBase]: For 355452/355462 co-relation queries the response was YES. [2024-06-20 16:22:45,149 INFO L83 FinitePrefix]: Finished finitePrefix Result has 115974 conditions, 20773 events. 14891/20773 cut-off events. For 355452/355462 co-relation queries the response was YES. Maximal size of possible extension queue 620. Compared 116583 event pairs, 6318 based on Foata normal form. 7/20719 useless extension candidates. Maximal degree in co-relation 115925. Up to 19839 conditions per place. [2024-06-20 16:22:45,259 INFO L140 encePairwiseOnDemand]: 39/53 looper letters, 162 selfloop transitions, 39 changer transitions 0/207 dead transitions. [2024-06-20 16:22:45,259 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 122 places, 207 transitions, 2335 flow [2024-06-20 16:22:45,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 16:22:45,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 16:22:45,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 181 transitions. [2024-06-20 16:22:45,268 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48787061994609165 [2024-06-20 16:22:45,268 INFO L175 Difference]: Start difference. First operand has 116 places, 159 transitions, 1637 flow. Second operand 7 states and 181 transitions. [2024-06-20 16:22:45,268 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 122 places, 207 transitions, 2335 flow [2024-06-20 16:22:45,609 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 118 places, 207 transitions, 2205 flow, removed 21 selfloop flow, removed 4 redundant places. [2024-06-20 16:22:45,611 INFO L231 Difference]: Finished difference. Result has 121 places, 172 transitions, 1791 flow [2024-06-20 16:22:45,612 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=1507, PETRI_DIFFERENCE_MINUEND_PLACES=112, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=159, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=121, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1791, PETRI_PLACES=121, PETRI_TRANSITIONS=172} [2024-06-20 16:22:45,612 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 65 predicate places. [2024-06-20 16:22:45,612 INFO L495 AbstractCegarLoop]: Abstraction has has 121 places, 172 transitions, 1791 flow [2024-06-20 16:22:45,612 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.333333333333334) internal successors, (120), 9 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:22:45,613 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:22:45,613 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:22:45,613 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-20 16:22:45,613 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-20 16:22:45,613 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:22:45,613 INFO L85 PathProgramCache]: Analyzing trace with hash 2017706590, now seen corresponding path program 3 times [2024-06-20 16:22:45,613 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:22:45,614 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1146157941] [2024-06-20 16:22:45,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:22:45,614 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:22:45,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:22:46,411 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:22:46,411 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:22:46,412 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1146157941] [2024-06-20 16:22:46,412 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1146157941] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:22:46,412 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:22:46,412 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 16:22:46,412 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [512180957] [2024-06-20 16:22:46,412 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:22:46,413 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 16:22:46,414 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:22:46,414 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 16:22:46,415 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-20 16:22:46,566 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 53 [2024-06-20 16:22:46,566 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 121 places, 172 transitions, 1791 flow. Second operand has 8 states, 8 states have (on average 13.5) internal successors, (108), 8 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:22:46,566 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:22:46,566 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 53 [2024-06-20 16:22:46,566 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:22:49,627 INFO L124 PetriNetUnfolderBase]: 14957/20859 cut-off events. [2024-06-20 16:22:49,628 INFO L125 PetriNetUnfolderBase]: For 400218/400241 co-relation queries the response was YES. [2024-06-20 16:22:49,695 INFO L83 FinitePrefix]: Finished finitePrefix Result has 122913 conditions, 20859 events. 14957/20859 cut-off events. For 400218/400241 co-relation queries the response was YES. Maximal size of possible extension queue 621. Compared 117099 event pairs, 6333 based on Foata normal form. 24/20820 useless extension candidates. Maximal degree in co-relation 122861. Up to 19898 conditions per place.